Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized for You

we will pick new questions that match your level based on your Timer History

Track Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

It appears that you are browsing the GMAT Club forum unregistered!

Signing up is free, quick, and confidential.
Join other 500,000 members and get the full benefits of GMAT Club

Registration gives you:

Tests

Take 11 tests and quizzes from GMAT Club and leading GMAT prep companies such as Manhattan GMAT,
Knewton, and others. All are free for GMAT Club members.

Applicant Stats

View detailed applicant stats such as GPA, GMAT score, work experience, location, application
status, and more

Books/Downloads

Download thousands of study notes,
question collections, GMAT Club’s
Grammar and Math books.
All are free!

Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:

Re: In the xy-plane, what is the y-intercept of line? [#permalink]

Show Tags

25 Sep 2009, 02:51

3

This post received KUDOS

1) insuff. l=> y=mx+n where m is slope and n is y intercept. so we can think it like. y=3nx+n. Therefore the y intercept, n, can be any value. 2)insuff. it says, when y=0, x becomes -1/3. Thus in a line l=y=mx+n 0=-1/3m+n 3n=m So it can be any value it is same as 1. Together 0=3n.-1/3+n 0=0 This does not give us anything. So insuff. Lets plug in some numbers. Say n=1 Then line becomes y=3x+1 both A and B works. Say n=2 then line becomes y=6x+2 both A and B works

Schools: LBS, INSEAD, IMD, ISB - Anything with just 1 yr program.

Re: In the xy-plane, what is the y-intercept of line? [#permalink]

Show Tags

29 Nov 2009, 15:41

Equation of a line is y = m*x + c where m is the slope of the line and c is the y-intercept, the value of y when x is zero.

Stmt-1: m = 3 * c. We can deduce nothing about the value of c based on this information. Stmt-2: x-intercept given is the value of x when y is zero. Therefore, 0 = m * (-1/3) + c. Solving it, we again get m = 3 * c.

As you see, both statements are the same and there is no point considering them together for possibility of answer choice C coming right.

Re: In the xy-plane, what is the y-intercept of line? [#permalink]

Show Tags

29 Nov 2009, 16:09

BarneyStinson wrote:

Equation of a line is y = m*x + c where m is the slope of the line and c is the y-intercept, the value of y when x is zero.

Stmt-1: m = 3 * c. We can deduce nothing about the value of c based on this information. Stmt-2: x-intercept given is the value of x when y is zero. Therefore, 0 = m * (-1/3) + c. Solving it, we again get m = 3 * c.

As you see, both statements are the same and there is no point considering them together for possibility of answer choice C coming right.

Hence, E.

Thank you so much Barney! It is kind of clear now ) (5days left b4 my test )

Re: In the xy-plane, what is the y-intercept of line? [#permalink]

Show Tags

29 Nov 2013, 07:55

Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________

In the x–y plane, what is the y–intercept of the line l?

Equation of a line in point intercept form is \(y=mx+b\), where: \(m\) is the slope of the line; \(b\) is the y-intercept of the line (the value of \(y\) for \(x=0\)).

The question is \(b=?\)

(1) The slope of line l is 3 times its y-intercept --> \(m=3b\). Not sufficient to calculate \(b\).

(2) The x-intercept of line l is -1/3 --> x-intercept is the value of \(x\) for \(y=0\) --> \(0=-\frac{1}{3}m+b\) --> \(m=3b\). Same info as above. Not sufficient.

We’ve given one of our favorite features a boost! You can now manage your profile photo, or avatar , right on WordPress.com. This avatar, powered by a service...

Sometimes it’s the extra touches that make all the difference; on your website, that’s the photos and video that give your content life. You asked for streamlined access...

A lot has been written recently about the big five technology giants (Microsoft, Google, Amazon, Apple, and Facebook) that dominate the technology sector. There are fears about the...

Post today is short and sweet for my MBA batchmates! We survived Foundations term, and tomorrow's the start of our Term 1! I'm sharing my pre-MBA notes...